Greetings! My name is Game Master Razerium. I received your Battle.net Support Ticket regarding reporting players.
A mob can be trapped multiple times by different people as long as the traps are approximately in the right location, for what it's worth Patmypet. It's therefore not something we consider to be violating our Terms of Use/game policies.
Unless there's more at work like specific griefing for special mobs or killing it before it can be trapped to negatively affect a specific player, it's unlikely we'd intervene.